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In Reply to: RE: Magnavox EL84 mod suggestions posted by sony6060 on March 28, 2015 at 14:53:03
Confused. I have a 6EU7, two 6q5's, and one 6ca4. Where are you putting the 12AX7?
Follow Ups:
6EU7 and 12AX7 are about the same tube inside the bottle. Both are twin triodes with a mu of 100. The 12AX7 has a center-tapped 12 volt heater so it can be run on either a 12 or 6 volt heater supply. The 6EU7's two heaters are in series and need 6 volts.
So you'd have to rewire the socket to use a 12AX7, but that's it. Also, if you rewired for a 12AX7, you could try a 12AT7 (mu of 60) to see if that sounds better to you.
My version used 12AX7. Best 6EU7 I heard are Raytheon.
Some of those did use a 12AX7 (obviously not the one that the OP has, though).
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